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Dolphin brain circuitry hints at how they sense sound

July 22, 2015

Neuroscientists have for the first time mapped the sensory and motor systems in the brains of dolphins. The video features a computer simulation of white matter tracts in the dolphin brain and an interview with Emory University neuroscientist Gregory Berns. The researchers applied a novel technique of diffusion tensor imaging (DTI) on the preserved brains of two dolphins that died after standing on a beach. Dolphins use echolocation and the results show that at least two areas of the dolphin brain are associated with the auditory system, unlike most mammals that primarily process sound in a single area. In fact, the dolphin auditory system resembles that of the bat.